C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
C09K 8/36 (2006.01) C09K 8/34 (2006.01)
Patent
CA 2047697
The invention describes the use of selected esters, fluid at room temperature and with flash points above 80°C, of C1-5-monocarboxylic acids and mono- and/or polyfunctional alcohols as the oil phase, or a component of the oil phase of invert drilling muds which are suitable for environment-friendly development of petroleum or natural gas deposits and contain in a continuous oil phase a dispersed aqueous phase together with emulsifiers, weighting agents, fluid-loss additives and preferably further conventional additives. In a further embodiment the invention relates to invert drilling fluids of the type described, which are characterized in that the oil phase contains esters from C1-5-monocarboxylic acids with mono- and/or polyfunctional alcohols preferably in admixture with other components from the class of ecologically acceptable compounds.
Burbach Frank
Herold Claus-Peter
Mueller Heinz
Neuss Michael
von Tapavicza Stephan
Borden Ladner Gervais Llp
Cognis Deutschland Gmbh & Co. Kg
Henkel Kommanditgesellschaft Auf Aktien
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